We have an African Grey Parrot and he is a big boy. Along with having this delightful family member comes lots and lots of bird dander. If you have a large bird you know what I mean. 

This Air Filtration system has been a life saver. 

A little Tip, I vacuum the pre-filter and wash it with hot water an dish soap every 2 weeks. Dry it on Hot for 20 minutes and reuse it. This saves having to replace the filter as often. With a Large Bird like Socrates We replace the filter about every 4 months, but I also have a dog and a cat that Shead a lot. If you only have the Bird then you can probably go 6 months with utilizing my trick.